In the old days, astronomers who wanted to use a powerful telescope had to buy plane tickets and cross their fingers the weather would cooperate.
Lifted out of a travel carrier, the owl screeched and bit its handler's leather glove. The bird was returning to its historic home—and helping to save its species.
Who will be the first to prove the existence of dark matter and dark energy? A particle physicist and an astrophysicist go head to head.